SUV roof rails retrofit?
I never thought I'd need a roof luggage box or anything like it so I decided to configure my GLC SUV without roof rails. Unfortunately, the day came and it seems that the possibility of putting some load on the roof would be a plus for me (to be honest - I have some woodden struts to buy and they are long enough so they won't fit inside but there's so few of them that no sane mill will sell me them with shipping.

I thought about roof rack but I don't have OEM rails.
I'm a bit afraid of all those roof-edge installation racks that they will scratch my roof (and a friend of my had serious leaks into the inside of the car because the seal along the door edge was not sealing the door properly after installing such rack.
Is there any reasonable possibility of retrofitting a factory roof rails? If so, can anyone provide me with needed part numbers?
Best regards,
MK
Roof rails have through fasteners into the roof sheet metal. While not impossible, shops may be reluctant. Porsche dealers won’t add rails after the fact because of damage, appearance and leak risks.
Roof rails have through fasteners into the roof sheet metal. While not impossible, shops may be reluctant. Porsche dealers won’t add rails after the fact because of damage, appearance and leak risks.

To rent anything just for this would be a huge overkill. I thought about roof rails because the rack could after all come handy again in the future.
I see your point though. If the rails indeed do need drilling in the roof sheet then I'd definitely not go for it.
Rent a full size SUV from Enterprise for one day. It likely has roof rails.
Both of the above ideas are less than $100. Roof rails on a GLC that doesn't have them will be 10x the cost, or more. And the roof might leak.
Last edited by chassis; Jun 8, 2021 at 08:15 AM.
Maybe I'll have to rent something for a day indeed. Haven't thought about it to be honest and it seems cheaper than I thought (should be around 50$ per day).
Thanks for the idea.




Have you considered high density foam ‘racks’ designed to carry Kayaks and surf boards ?
Theses stretch across roof and are held in place with webbing straps, fold up into a carry bag. I presume purchase from a surf shop or outdoor Watersport outlet.
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There are about a dozen manuf out there with varying features and price points.
Just make sure base are not rough or sandy as they will create scratch or rub marks on roof. Only fit them when you want to use to avoid roof noise or wind rub,vibration.
Handy to store under trunk for opportune purchasing !!
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If you have the flush side rails, then you can easily add after-market crossbars for about one-quarter of the Mercedes dealership cost for the OEM ones -- they install by clamping to the factory installed side rails that run front to back (which is similar to how the OEM crossbars install).




